* - management of global state
*/
/*
- * This file is
- * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
- *
- * It is part of adns, which is
- * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
- * Copyright (C) 1999-2000 Tony Finch <dot@dotat.at>
+ * This file is part of adns, which is
+ * Copyright (C) 1997-2000,2003,2006 Ian Jackson
+ * Copyright (C) 1999-2000,2003,2006 Tony Finch
+ * Copyright (C) 1991 Massachusetts Institute of Technology
+ * (See the file INSTALL for full details.)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
static void readconfig(adns_state ads, const char *filename, int warnmissing);
-static void addserver(adns_state ads, struct in_addr addr) {
+static void addserver(adns_state ads, const struct sockaddr *sa, int n) {
int i;
- struct server *ss;
+ adns_rr_addr *ss;
+ const struct sockaddr_in *sin;
+
+ assert(sa->sa_family==AF_INET); assert(n>=sizeof(*sin));
+ sin= (const void *)sa;
for (i=0; i<ads->nservers; i++) {
- if (ads->servers[i].addr.s_addr == addr.s_addr) {
- adns__debug(ads,-1,0,"duplicate nameserver %s ignored",inet_ntoa(addr));
+ assert(ads->servers[i].addr.sa.sa_family==AF_INET);
+ if (ads->servers[i].addr.inet.sin_addr.s_addr == sin->sin_addr.s_addr) {
+ adns__debug(ads,-1,0,"duplicate nameserver %s ignored",
+ inet_ntoa(sin->sin_addr));
return;
}
}
if (ads->nservers>=MAXSERVERS) {
- adns__diag(ads,-1,0,"too many nameservers, ignoring %s",inet_ntoa(addr));
+ adns__diag(ads,-1,0,"too many nameservers, ignoring %s",
+ inet_ntoa(sin->sin_addr));
return;
}
ss= ads->servers+ads->nservers;
- ss->addr= addr;
+ assert(n <= sizeof(ss->addr));
+ ss->len = n;
+ memcpy(&ss->addr, sa, n);
ads->nservers++;
}
static void ccf_nameserver(adns_state ads, const char *fn,
int lno, const char *buf) {
- struct in_addr ia;
-
- if (!inet_aton(buf,&ia)) {
+ struct sockaddr_in sin;
+
+ memset(&sin,0,sizeof(sin));
+ sin.sin_family= AF_INET;
+ sin.sin_port= htons(DNS_PORT);
+ if (!inet_aton(buf,&sin.sin_addr)) {
configparseerr(ads,fn,lno,"invalid nameserver address `%s'",buf);
return;
}
- adns__debug(ads,-1,0,"using nameserver %s",inet_ntoa(ia));
- addserver(ads,ia);
+ adns__debug(ads,-1,0,"using nameserver %s",inet_ntoa(sin.sin_addr));
+ addserver(ads,(const struct sockaddr *)&sin,sizeof(sin));
}
static void ccf_search(adns_state ads, const char *fn,
int lno, const char *buf) {
const char *word;
char tbuf[200], *slash, *ep;
+ const char *maskwhat;
struct in_addr base, mask;
int l;
unsigned long initial, baselocal;
if (slash) {
if (strchr(slash,'.')) {
+ maskwhat = "mask";
if (!inet_aton(slash,&mask)) {
configparseerr(ads,fn,lno,"invalid mask `%s' in sortlist",slash);
continue;
}
- if (base.s_addr & ~mask.s_addr) {
- configparseerr(ads,fn,lno, "mask `%s' in sortlist"
- " overlaps address `%s'",slash,tbuf);
- continue;
- }
} else {
+ maskwhat = "prefix length";
initial= strtoul(slash,&ep,10);
if (*ep || initial>32) {
configparseerr(ads,fn,lno,"mask length `%s' invalid",slash);
mask.s_addr= htonl((0x0ffffffffUL) << (32-initial));
}
} else {
+ maskwhat = "implied mask";
baselocal= ntohl(base.s_addr);
- if (!baselocal & 0x080000000UL) /* class A */
+ if (!(baselocal & 0x080000000UL)) /* class A */
mask.s_addr= htonl(0x0ff000000UL);
else if ((baselocal & 0x0c0000000UL) == 0x080000000UL)
mask.s_addr= htonl(0x0ffff0000UL); /* class B */
}
}
- ads->sortlist[ads->nsortlist].base= base;
- ads->sortlist[ads->nsortlist].mask= mask;
+ if (base.s_addr & ~mask.s_addr) {
+ configparseerr(ads,fn,lno, "%s `%s' in sortlist"
+ " overlaps address `%s'",maskwhat,
+ slash ? slash : inet_ntoa(mask), tbuf);
+ continue;
+ }
+
+ ads->sortlist[ads->nsortlist].af= AF_INET;
+ ads->sortlist[ads->nsortlist].base.v4= base;
+ ads->sortlist[ads->nsortlist].mask.v4= mask;
ads->nsortlist++;
}
}
ccip++);
if (!ccip->name) {
adns__diag(ads,-1,0,"%s:%d: unknown configuration directive `%.*s'",
- filename,lno,q-p,p);
+ filename,lno,(int)(q-p),p);
continue;
}
while (ctype_whitespace(*q)) q++;
static int init_begin(adns_state *ads_r, adns_initflags flags,
adns_logcallbackfn *logfn, void *logfndata) {
adns_state ads;
+ pid_t pid;
ads= malloc(sizeof(*ads)); if (!ads) return errno;
timerclear(&ads->tcptimeout);
ads->searchlist= 0;
+ pid= getpid();
+ ads->rand48xsubi[0]= pid;
+ ads->rand48xsubi[1]= (unsigned long)pid >> 16;
+ ads->rand48xsubi[2]= pid ^ ((unsigned long)pid >> 16);
+
*ads_r= ads;
return 0;
}
static int init_finish(adns_state ads) {
- struct in_addr ia;
+ struct sockaddr_in sin;
struct protoent *proto;
- int r;
+ int i, r;
if (!ads->nservers) {
if (ads->logfn && ads->iflags & adns_if_debug)
- adns__lprintf(ads,"adns: no nameservers, using localhost\n");
- ia.s_addr= htonl(INADDR_LOOPBACK);
- addserver(ads,ia);
+ adns__lprintf(ads,"adns: no nameservers, using IPv4 localhost\n");
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_port = htons(DNS_PORT);
+ sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ addserver(ads,(struct sockaddr *)&sin, sizeof(sin));
}
+ /* we can't cope with multiple transport address families yet */
+ for (i=0; i<ads->nservers; i++)
+ assert(ads->servers[i].addr.sa.sa_family==AF_INET);
+
proto= getprotobyname("udp"); if (!proto) { r= ENOPROTOOPT; goto x_free; }
ads->udpsocket= socket(AF_INET,SOCK_DGRAM,proto->p_proto);
if (ads->udpsocket<0) { r= errno; goto x_free; }
~ianmdlvl / adns.git / blobdiff